The ______ old woman often walks in the park ______.
A. alone; lonely B. alone; alone C. lonely; alone D. lonely; lonely
We want to be ______ because, as students, we should learn to help other people.
A. performers B. interviewers C. patients D. volunteers
I am too busy to listen to her ______ talking. She has talked for about two hours.
A. hopeless B. endless C. harmless D. careless
－Look, your sister is playing the piano over there.
－She ______ be my sister. She has gone to America.
A. mustn't B. can't C. shouldn't D. may not
It is polite ______ you to give seats to the elderly.
A. with B. for C. of D. to
－Why are there a lot of dead fish in the river?
－Because they were ______ by the polluted water.
A. caught B. poisoned C. burned D. protected
